<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script type="text/javascript" src="../js/vue.js">
    </script>
</head>
<body>

<!--准备容器-->
<div id="root">
    <h2>人员列表</h2>
    <input type="text" v-model="keyWord">
    <ul>
        <li v-for="p in filPersons" :key="p.id">
            {{p.name}}-{{p.age}}-{{p.sex}}
        </li>
    </ul>

</div>

<script type="text/javascript">
    Vue.config.productionTip = false;

    //用watch实现
    /*new Vue({
        el: '#root',
        data: {
            keyWord: '',
            persons: [
                {id: '001', name: '马冬梅', age: 18, sex: '女'},
                {id: '002', name: '周冬雨', age: 19, sex: '女'},
                {id: '003', name: '周杰伦', age: 20, sex: '男'},
                {id: '004', name: '温兆伦', age: 22, sex: '男'}
            ],
            filPersons: []
        },
        watch: {
            keyWord: {
                immediate:true,
                handler(val) {
                    //filter函数会返回一个新数组
                    this.filPersons = this.persons.filter((p) => {
                        //返回条件  p.name 包含指定字段 但是indexOf(val) 返回值不存在-1  存在 >= 0
                        return p.name.indexOf(val) !== -1
                    })
                }
            }

            }
        })*/

    new Vue({
        el: '#root',
        data: {
            keyWord: '',
            persons: [
                {id: '001', name: '马冬梅', age: 18, sex: '女'},
                {id: '002', name: '周冬雨', age: 19, sex: '女'},
                {id: '003', name: '周杰伦', age: 20, sex: '男'},
                {id: '004', name: '温兆伦', age: 22, sex: '男'}
            ],
        },
        computed:{
            filPersons(){
                return this.persons.filter((p) => {
                    //返回条件  p.name 包含指定字段 但是indexOf(val) 返回值不存在-1  存在 >= 0
                    return p.name.indexOf(this.keyWord) !== -1
                })
            }
        }
    })
</script>
</body>
</html>